JPWO2015072483A1 - 作業車両及びその制御方法 - Google Patents
作業車両及びその制御方法 Download PDFInfo
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- JPWO2015072483A1 JPWO2015072483A1 JP2015529351A JP2015529351A JPWO2015072483A1 JP WO2015072483 A1 JPWO2015072483 A1 JP WO2015072483A1 JP 2015529351 A JP2015529351 A JP 2015529351A JP 2015529351 A JP2015529351 A JP 2015529351A JP WO2015072483 A1 JPWO2015072483 A1 JP WO2015072483A1
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- motor
- torque
- speed
- command value
- clutch
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Classifications
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- Y10S903/904—Component specially adapted for hev
- Y10S903/906—Motor or generator
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Abstract
Description
29に、エンジン21からの駆動力の一部を伝達する。すなわち、PTO22は、これらの油圧ポンプ23, 30, 29と、動力伝達装置24とにエンジン21からの駆動力を分配する。
MG2, MG3の回転速度指令を出力してもよい。この場合、インバータI1, I2, I3が回転速度指令に応じた指令トルクを計算して、モータMG1, MG2, MG3を制御する。また、制御部27は、各クラッチCF, CR, CH, CL, Cm1, Cm2のクラッチ油圧を制御するための指令信号をクラッチ制御弁38に与える。クラッチ制御弁38は、各クラッチCF, CR, CH, CL, Cm1, Cm2を制御するための複数のバルブを含む。
[数1]
Ts1_Low = Te_ref * r_fr
Tc1_Low = Ts1_Low * (-1) * ( (Zr1/Zs1) + 1 )
Tr2_Low = To_ref * (Zod/Zo)
Ts2_Low = Tr2_Low * (Zs2/Zr2)
Tcp1_Low = Tc1_Low + Ts2_Low
Tm1_Low = Tcp1_Low * (-1) * (Zp1/Zp1d)
Tr1_Low = Ts1_Low * (Zr1/Zs1)
Tm2_Low = Tr1_Low * (-1) * (Zp2/Zp2d)
また、モータ指令決定部83は、以下の数2に示す第2のトルクバランス情報を用いてHiモードでのモータMG1, MG2への指令トルクTm1_Hi, Tm2_ Hiを決定する。本実施形態において、第2のトルクバランス情報は、動力伝達装置24でのトルクの釣り合いの式である。
[数2]
Ts1_Hi = Te_ref * r_fr
Tc1_Hi = Ts1_Hi * (-1) * ( (Zr1/Zs1) + 1 )
Tr2_Hi = To_ref * (Zod/Zo)
Ts2_Hi = Tr2_Hi * (Zs2/Zr2)
Tcp1_Hi = Tc1_Hi + Ts2_Hi
Tm1_Hi = Tcp1_Hi * (-1) * (Zp1/Zp1d)
Tr1_Hi = Ts1_Hi * (Zr1/Zs1)
Tc2_Hi = Tr2_Hi * (-1) * ( (Zs2/Zr2) + 1 )
Tcp2_Hi = Tr1_Hi + Tc2_Hi
Tm2_Hi = Tcp2_Hi * (-1) * (Zp2/Zp2d)
ここで、各トルクバランス情報のパラメータの内容は以下の表1の通りである。
[数3]
Tm1= Tm3= Tm1_ref / (1+r)
なお、rは、第1モータMG1に対する第3モータMG3の増速比である。すなわち、第3モータMG3の回転速度は、第1モータMG1の回転速度のr倍である。また、第3モータMG3のトルクは、r倍になって第1モータMG1の回転軸に伝達される。なお、r > 1であれば第3モータMG3のトルクはr倍になって第1モータMG1を補助することになり、さらにモータを小型化することができる。
[数4]
Tm1_ref≦Tlim1のとき、
Tm1=Tm1_ref
Tm3=0
Tm1_ref>Tlim1のとき、
Tm1=Tlim1
Tm3=(Tm1_ref-Tlim1) / r
第1変形例に係る第3モータMG3へのトルク分配方法では、要求トルクが所定の限界トルクTlim1より大きいときには、第3モータMG3によって第1モータMG1を補助することができる。また、要求トルクが所定の限界トルクTlim1以下であるときには、第3モータMG3の指令トルクが所定の待機指令値であるので、第3モータMG3の接続の切換が行われても、ショックの発生を抑えることができる。なお、第3モータMG3が第2モータMG2に接続されている場合には、上記の第1モータMG1への指令トルクと同様にして、第2モータMG2への指令トルクが決定される。
[数5]
Tm1_ref≦Tlim1のとき、
Tm1=Tm1_ref
Tm3=0
Tlim1<Tm1_ref≦Tlim1*(1+r)のとき
Tm1=Tlim1
Tm3=(Tm1_ref-Tlim1) / r
Tlim1*(1+r)<Tm1_refのとき、
Tm1=Tm3=Tm1_ref / (1+r)
第2変形例に係る第3モータMG3へのトルク分配方法では、要求トルクが所定のトルク閾値Tqth1以下であるときには、第3モータMG3の指令トルクが所定の待機指令値であるので、第3モータMG3の接続の切換が行われても、ショックの発生を抑えることができる。また、要求トルクが所定のトルク閾値Tqth1より大きく、第3モータMG3の指令トルクがトルク閾値Tqth1以下であるときには、第3モータMG3によって第1モータMG1を補助することができる。さらに、要求トルクが所定のトルク閾値Tqth1より大きく、第3モータMG3の指令トルクがトルク閾値Tqth1よりも大きいときには、第3モータMG3が第1モータMG1と同じ大きさのトルクを出力するため、第3モータMG3によって補助されるトルクが大きくなる。これにより、第1モータMG1の出力トルクを低減することができ、動力伝達装置24において、第1モータMG1の出力トルクを伝達するための部品の消耗を抑えることができる。なお、第3モータMG3が第2モータMG2に接続されている場合には、上記の第1モータMG1への指令トルクと同様にして、第2モータMG2への指令トルクが決定される。
Claims (18)
- エンジンと、
前記エンジンによって駆動される油圧ポンプと、
前記油圧ポンプから吐出された作動油によって駆動される作業機と、
前記エンジンによって駆動される走行装置と、
前記エンジンからの駆動力を前記走行装置に伝達する動力伝達装置と、
前記動力伝達装置を制御する制御部と、
を備え、
前記動力伝達装置は、
入力軸と、
出力軸と、
遊星歯車機構を有し、前記入力軸の回転を前記出力軸に伝達する歯車機構と、
前記遊星歯車機構の第1の回転要素に接続される第1モータと、
前記遊星歯車機構の第2の回転要素に接続される第2モータと、
前記第1モータと前記第2モータとを補助するための第3モータと、
前記第3モータを前記第1モータ又は前記第2モータに接続した接続状態と、前記第3モータを前記第1モータと前記第2モータとの何れに対しても切断した切断状態とを、選択的に切り換え可能なモータ切換機構と、
を有し、
前記動力伝達装置は、前記第1モータと前記第2モータと前記第3モータとの回転速度を変化させることによって、前記入力軸に対する前記出力軸の回転速度比を変化させるように構成されており、
前記制御部は、
前記第3モータによる補助の要否を判定する接続判定部と、
前記接続判定部が前記第3モータによる補助が必要と判定したときには、前記第3モータを前記接続状態とし、前記接続判定部が前記第3モータによる補助が不要と判定したときには、前記第3モータを前記切断状態とするように、前記モータ切換機構を制御するモータ切換制御部と、
を有する、
作業車両。 - 前記制御部は、前記第3モータへのトルク又は回転速度の指令値を決定するモータ指令値決定部をさらに備え、
前記第3モータが前記切断状態であるときには、前記モータ指令値決定部は、前記第3モータへのトルク又は回転速度の指令値を所定の第1待機指令値にする、
請求項1に記載の作業車両。 - 前記第3モータを前記切断状態から前記接続状態に切り換えるときには、前記モータ指令値決定部は、前記第3モータの回転速度を前記第1モータ及び前記第2モータのうち前記第3モータを接続するモータの回転速度と同期させるように、前記第3モータへの前記指令値を決定する、
請求項2に記載の作業車両。 - 前記モータ切換機構は、前記第1モータ又は前記第2モータと、前記第3モータとの間の接続と遮断とを切り換えるクラッチを有し、
前記クラッチが切断状態から接続状態に切り換わることで、前記第3モータが前記切断状態から前記接続状態に切り換わり、
制御部は、現時点から所定の第1予測時間の経過後の前記第1モータ又は前記第2モータの回転速度の予測値である予測回転速度を演算する予測速度演算部を有し、
前記予測回転速度の前記第3モータの回転軸相当の回転速度と前記第3モータの回転速度との差が所定の切換閾値以下になると、前記モータ切換制御部は、前記クラッチの接続を開始する、
請求項3に記載の作業車両。 - 前記クラッチの接続開始時点から所定の第2予測時間が経過するまで、前記モータ指令値決定部は、前記第3モータへの指令トルクを所定の待機指令値にする、
請求項4に記載の作業車両。 - 前記モータ指令値決定部は、前記第3モータが接続されるモータへの要求指令トルクを決定し、
前記クラッチの接続開始時点から前記第2予測時間が経過したときに、前記モータ指令値決定部は、前記要求指令トルクに基づいて前記第3モータが接続されるモータと前記第3モータとへの指令トルクを決定する、
請求項5に記載の作業車両。 - 前記クラッチへの作動油の充填の完了を検知するクラッチ充填検出部をさらに備え、
前記クラッチの接続開始時点から前記クラッチ充填検出部が前記充填の完了を検知するまで、前記モータ指令値決定部は、前記第3モータへの指令トルクを所定の待機指令値にする、
請求項4に記載の作業車両。 - 前記モータ指令値決定部は、前記第3モータが接続されるモータへの要求指令トルクを決定し、
前記クラッチの接続開始後、前記クラッチ充填検出部が前記充填の完了を検知したときに、前記モータ指令値決定部は、前記要求指令トルクに基づいて前記第3モータが接続されるモータと前記第3モータとへの指令トルクを決定する、
請求項7に記載の作業車両。 - 車速の上限を規定する速度範囲を選択するための変速操作部材をさらに備え、
前記接続判定部は、所定の接続判定条件が満たされているときに、前記第3モータによる補助が必要であると判定し、
前記所定の接続判定条件は、前記変速操作部材によって最も低速の前記速度範囲が選択されていることを含む、
請求項1から8のいずれかに記載の作業車両。 - 車速を検知する車速検出部と、
アクセル操作部材と、
をさらに備え、
前記制御部は、前記車速と前記アクセル操作部材の操作量とに基づいて前記動力伝達装置の要求牽引力を決定するトランスミッション要求決定部をさらに有し、
前記接続判定部は、所定の接続判定条件が満たされているときに、前記第3モータによる補助が必要であると判定し、
前記所定の接続判定条件は、前記第1モータの出力トルクと前記第2モータの出力トルクとから得られる牽引力が前記要求牽引力に不足することを含む、
請求項1から8のいずれかに記載の作業車両。 - 車速の上限を規定する速度範囲を選択するための変速操作部材と、
車速を検知する車速検出部と、
アクセル操作部材と、
をさらに備え、
前記制御部は、前記車速と前記アクセル操作部材の操作量とに基づいて前記動力伝達装置の要求牽引力を決定するトランスミッション要求決定部をさらに有し、
前記接続判定部は、所定の切断判定条件が満たされているときに、前記第3モータによる補助が不要であると判定し、
前記所定の切断判定条件は、前記変速操作部材によって最も低速の前記速度範囲以外の速度範囲が選択されており、且つ、前記第1モータの出力トルクと前記第2モータの出力トルクとから得られる牽引力が前記要求牽引力に不足しないことを含む、
請求項1から8のいずれかに記載の作業車両。 - 前記モータ切換制御部は、前記第3モータの回転速度が所定の上限値より大きいときには、第3モータを前記切断状態とするように、前記モータ切換機構を制御する、
請求項1から8のいずれかに記載の作業車両。 - 前記第3モータを前記接続状態とした後の前記第3モータの回転速度が所定の上限回転速度を超えている場合には、前記モータ切換制御部は、前記第3モータを前記切断状態に切り換え、前記モータ指令値決定部は、前記第3モータの回転速度の指令値を、前記第1待機指令値より大きい所定の第2待機指令値とする、
請求項2又は3に記載の作業車両。 - 前記接続判定部は、前記要求牽引力を発生させるために必要となる前記第1モータの出力トルク又は前記第2モータの出力トルクが所定の上限閾値以上であるときに、前記第1モータの出力トルクと前記第2モータの出力トルクとから得られる牽引力が前記要求牽引力に不足すると判定する、
請求項10に記載の作業車両。 - 前記モータ切換機構は、前記第1モータ又は前記第2モータと、前記第3モータとの間の接続と遮断とを切り換えるクラッチを有し、
前記クラッチが切断状態から接続状態に切り換わることで、前記第3モータが前記切断状態から前記接続状態に切り換わり、
前記制御部は、
前記第3モータへのトルク又は回転速度の指令値と、前記第3モータが接続されるモータへの要求指令トルクとを決定するモータ指令値決定部と、
現時点から所定の第1予測時間の経過後の前記第1モータ又は前記第2モータの回転速度の予測値である予測回転速度を演算する予測速度演算部と、
をさらに有し、
前記第3モータが前記切断状態であるときには、前記モータ指令値決定部は、前記第3モータへのトルク又は回転速度の指令値を所定の第1待機指令値に設定し、
前記第3モータを前記切断状態から前記接続状態に切り換えるときには、前記モータ指令値決定部は、前記第3モータの回転速度を前記第1モータ及び前記第2モータのうち前記第3モータを接続するモータの回転速度と同期させるように、前記第3モータへの前記指令値を決定し、
前記予測回転速度の前記第3モータの回転軸相当の回転速度と前記第3モータの回転速度との差が所定の切換閾値以下になると、前記モータ切換制御部は、前記クラッチの接続を開始し、
前記クラッチの接続開始時点から所定の第2予測時間が経過するまで、前記モータ指令値決定部は、前記第3モータへの指令トルクを所定の待機指令値に設定し、
前記クラッチの接続開始時点から前記第2予測時間が経過したときに、前記モータ指令値決定部は、前記要求指令トルクに基づいて前記第3モータが接続されるモータと前記第3モータとへの指令トルクを決定し、
前記第3モータを前記接続状態とした後の前記第3モータの回転速度が所定の上限回転速度を超えている場合には、前記モータ切換制御部は、前記第3モータを前記切断状態に切り換え、前記モータ指令値決定部は、前記第3モータの回転速度の指令値を、前記第1待機指令値より大きい所定の第2待機指令値とする、
請求項1に記載の作業車両。 - 車速の上限を規定する速度範囲を選択するための変速操作部材と、
車速を検知する車速検出部と、
アクセル操作部材と、
をさらに備え、
前記制御部は、前記車速と前記アクセル操作部材の操作量とに基づいて前記動力伝達装置の要求牽引力を決定するトランスミッション要求決定部をさらに有し、
前記接続判定部は、所定の接続判定条件が満たされているときに、前記第3モータによる補助が必要であると判定し、
前記所定の接続判定条件は、前記変速操作部材によって最も低速の前記速度範囲が選択されていること、又は、前記要求牽引力を発生させるために必要となる前記第1モータの出力トルク又は前記第2モータの出力トルクが所定の上限閾値以上である前記第1モータの出力トルクと前記第2モータの出力トルクとから得られる牽引力が前記要求牽引力に不足することであり、
前記接続判定部は、所定の切断判定条件が満たされているときに、前記第3モータによる補助が不要であると判定し、
前記所定の切断判定条件は、前記変速操作部材によって最も低速の前記速度範囲以外の速度範囲が選択されており、且つ、前記第1モータの出力トルクと前記第2モータの出力トルクとから得られる牽引力が前記要求牽引力に不足しないことを含み、
前記モータ切換制御部は、前記所定の切断判定条件が満たされていなくても、前記第3モータの回転速度が所定の上限値より大きいときには、第3モータを前記切断状態とするように、前記モータ切換機構を制御する、
請求項1又は15に記載の作業車両。 - 前記動力伝達装置における駆動力伝達経路を複数のモード間で切り換えるためのモード切換機構と、
車速の上限を規定する速度範囲を選択するための変速操作部材と、
をさらに備え、
前記第3モータが前記切断状態であるときに、前記モータ指令値決定部は、選択されている前記モードと前記速度範囲とに応じた所定回転速度で前記第3モータが待機状態となるように、前記第3モータへのトルク又は回転速度の指令値を決定する、
請求項2に記載の作業車両。 - エンジンと、
前記エンジンによって駆動される油圧ポンプと、
前記油圧ポンプから吐出された作動油によって駆動される作業機と、
前記エンジンによって駆動される走行装置と、
前記エンジンからの駆動力を前記走行装置に伝達する動力伝達装置と、
を備える作業車両の制御方法であって、
前記動力伝達装置は、
入力軸と、
出力軸と、
遊星歯車機構を有し、前記入力軸の回転を前記出力軸に伝達する歯車機構と、
前記遊星歯車機構の第1の回転要素に接続される第1モータと、
前記遊星歯車機構の第2の回転要素に接続される第2モータと、
前記第1モータと前記第2モータとを補助するための第3モータと、
前記第3モータを前記第1モータ又は前記第2モータに接続した接続状態と、前記第3モータを前記第1モータと前記第2モータとの何れに対しても切断した切断状態とを、選択的に切り換え可能なモータ切換機構と、
を有し、
前記動力伝達装置は、前記第1モータと前記第2モータと前記第3モータとの回転速度を変化させることによって、前記入力軸に対する前記出力軸の回転速度比を変化させるように構成されており、
前記第3モータによる補助の要否を判定するステップと、
前記第3モータによる補助が必要と判定されたときに、前記第3モータを前記接続状態とするように前記モータ切換機構を制御するステップと、
前記第3モータによる補助が不要と判定されたときに、前記第3モータを前記切断状態とするように前記モータ切換機構を制御するステップと、
を備える作業車両の制御方法。
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Publication number | Publication date |
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CN105189170B (zh) | 2017-07-07 |
EP2955076A1 (en) | 2015-12-16 |
WO2015072483A1 (ja) | 2015-05-21 |
US9708795B2 (en) | 2017-07-18 |
JP6473083B2 (ja) | 2019-02-20 |
EP2955076B1 (en) | 2022-01-26 |
CN105189170A (zh) | 2015-12-23 |
EP2955076A4 (en) | 2016-10-19 |
US20160032563A1 (en) | 2016-02-04 |
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